Webshots
This shareware screen saver program can be loaded with picture packs that cover
a wide range
of topics such as animals, various sports, nature... The photographs are professional
quality and are simply the best you'll see.
This is highly recommended! Available for Windows and Macintosh. Webshots also offers
a program for creating your own custom screen savers.

Screen Savers a2z
A great site for free and shareware screensavers! The "What's New" section
always has some interesting new screen savers listed, and there is a section for
Macintosh savers also.

Screensavershots.com
A very nice shareware/freeware site with a screen shot of each screensaver offered. Many
topics are covered and much information is given on each screen saver.

screensaver.com
Extensive descriptions of each screen saver along with a preview image make this
site a winner. The selection is not huge, but the ease of navigation and info
given for each screen saver is excellent. Windows only.

FreeSaver.com
This is one of my favorite free screen saver sites despite the frames and the long
download time. The specialty here is "no nag" savers, and there are lots of them!
Thumbnails are provided along with a short description of each screensaver.
There are screen savers for the Macintosh as well as Windows here.

Screens and Themes
A very extensive listing of free and shareware screen savers. You will also find
wallpaper, desktop themes, and icons here.

Screen Saver Heaven
A very large selection of free and shareware screen savers to choose from!
Most have previews. There are also wallpaper pictures, games, and desktop themes,
as well as utilities you may need to make your screen savers go.